title: The cytogenetic identification of high risk members in colorectal cancer families.
abstract: Family history of colorectal cancer is recognized as a risk factor for the disease and the development of colorectal cancer represents a suitable model for illustrating multistep tumor development. Bleomycin induced chromosome sensitivity studies were done in 7 colorectal cancer families consisting of 12 colorectal cancer patients and their 34 first degree relatives and 12 sporadic colorectal patients for comparison and identification of high risk family members with genetic instability. All patients and 4 unaffected relatives showed increased bleomycin sensitivity, which might be due to defective DNA repair system. These four relatives may be classified as high risk (without cancer at present) individuals. The study is being continued in more number of familial colorectal cancer patients and their relatives to arrive at definite conclusions.
authors.affiliation: Division of Cancer Research, Regional Cancer Centre, Trivandrum, India.
authors.forename: B
authors.initials: B
authors.lastname: Jyothish
authors.forename: R
authors.initials: R
authors.lastname: Ankathil
authors.forename: R
authors.initials: R
authors.lastname: Chandini
authors.forename: B
authors.initials: B
authors.lastname: Vinodkumar
authors.forename: G S
authors.initials: GS
authors.lastname: Nayar
authors.forename: D D
authors.initials: DD
authors.lastname: Roy
authors.forename: J
authors.initials: J
authors.lastname: Madhavan
authors.forename: M K
authors.initials: MK
authors.lastname: Nair
mesh_terms: D000328:Adult; D000368:Aged; D001761:Bleomycin / Q000494:pharmacology*; D015179:Colorectal Neoplasms / Q000235:genetics*; D005192:Family Health; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016296:Mutagenesis; D012306:Risk
chemical_list: D001761:Bleomycin